Method for extracting and purifying polyether polyol waste residue

The invention belongs to the technical field of polymer chemical industry, and particularly relates to a method for extracting and purifying polyether polyol waste residues. The method for extracting and purifying the polyether polyol waste residues comprises the following steps: adding the polyether polyol waste residues into an organic solvent, stirring and extracting; the polyether polyol waste residue is a filter cake generated by filtering after acid post-treatment and adsorbent adsorption of a polyether polyol crude product prepared by taking alkali metal hydroxide as a catalyst. The main substances in the polyether polyol waste residue are polyether polyol, an adsorbent, and potassium salt generated by post-treatment acid and potassium hydroxide. According to the method for extracting and purifying the polyether polyol waste residues, the organic solvent is adopted for extracting the waste residues, the method is suitable for various acid post-treatment processes, polyether polyol, an adsorbent and syl